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For a helical antenna, the half-power beamwidth and directive gain are given by
where C = πD, N = L/S, and S = C tan α,in which α is called the pitch angle, and
The input impedance seen by the transmission line at point P is almost purely resistive, given by Za ∼ = 140C/λ. Calculate the antenna parameters of a 10-turn helix at f = 500 MHz by assuming that C = λ and α = 14π/180.
The variable resistor Z o in the circuit shown in Fig. 1 is adjusted until maximum average power is delivered to Zo. a) Find the value of Z o b) Calculate the maximum av
Q. How and why are the grounding and shielding used in electronic instruments? Sol. In electronic instruments grounding and Shielding techniques are available in order to a
Explain the effect of impurity on the conductivity of a semiconductor. To form a semi-conductor conductive, a small amount of appropriate impurity is added. This is then termed
Octal to binary Conversion Conversion form octal to binary is the reverse of this process. Express each octal digit in three bit binary equivalent. Ex. Convert 3576
I am assigned to make above mentioned thing...Know the theory but need an authentic circuit diagram(simple).It must contain a solenoid and other simple objects
The ampere has been defined (by the International Committee of Weights and Measures in 1946) as the current flowing in two long parallel wires 1 metre apart that produces a force o
cross magnetizing components of armature reaction is...........
Q. A 60-Hz, six-pole, wye-connected, three-phase induction motor, with the parameters R 1 = R 2 = 0.025 and Xl 1 = Xl 2 = 0.125 , is controlled by variable-frequency control
Get the equivalent inductance at terminal in circuit: Acquire the equivalent inductance at terminal AB in circuit shown in Figure. Solution Inductances also follow the
Q. With a neat circuit diagram explain the working of a Hartley oscillator using an npn transistor and obtain the expression for oscillation frequency and for minimum gain for sust
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